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Senior UI Architect - AI SaaS Platform - London (Hybrid), slough
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Client:
Location:
slough, United Kingdom
Job Category:
Other
-
EU work permit required:
Yes
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Job Views:
1
Posted:
04.06.2025
Expiry Date:
19.07.2025
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Job Description:
About the Role
Stax - Deep Tech Headhunters are partnering with a high-growth international Series A company on a mission to transform the way organisations harness AI for customer support and product operations.
They’re looking for a Senior UI Architect who sits at the intersection of design excellence and engineering. This is a hands-on, systems-level leadership role for someone who doesn’t just ship components—they craft cohesive, elegant, ultra-performant experiences.
You’ll play a defining role in setting the architectural direction for all user-facing surfaces—from fast, reactive dashboards to rich collaborative tools—ensuring interfaces are not only beautiful and intuitive, but also scalable and lightning-fast.
What You’ll Do
* Architect performant, low-latency UI systems that feel instantaneous and intuitive
* Elevate the design system with best-in-class standards for simplicity, extensibility, and polish
* Drive tight collaboration with product designers—translating vision into crisp, low-friction user flows
* Mentor and uplift engineers across teams on code quality, architecture, and UX craft
* Set and uphold benchmarks for UI performance (TTI, Lighthouse, bundle sizes, animation fluidity)
* Lead innovation across complex surfaces like search, timelines, real-time dashboards, and data-dense interfaces
* Define and enforce front-end best practices, including accessibility, interaction design, and motion principles
* Partner closely with backend and platform teams to influence API design for optimal UX
You Might Be a Fit If You Have
* 10–15+ years of experience building production-grade UIs using TypeScript, React, GraphQL, and modern CSS frameworks
* A strong track record architecting scalable frontend systems and leading large UI projects end-to-end
* Mastery of UI performance concepts (hydration, layout thrashing, render timing, etc.)
* Experience evolving design systems at scale—with an eye for consistency, structure, and documentation
* A design-sensitive approach to development, treating UX as a shared responsibility
* Bonus: Experience with real-time data, stream-based UIs, or visualization libraries like D3/WebGL
* Bonus: Familiarity with PLG principles and the UX nuances of high-growth B2B SaaS platforms
Why This Role?
You’ll be joining a deeply design-led culture, where architecture is about crafting user delight—not just technical scalability. This is an opportunity to shape the front-end foundation of a new category-defining platform at the ground level, in an environment that values velocity, quality, and cross-disciplinary collaboration.
Architects here don’t operate in silos. They lead from the front—building, mentoring, and pushing boundaries every day. Stax is proud to represent this opportunity. If you’re a UI leader who’s excited by scale, strategy, and AI-powered innovation, we’d love to hear from you. We welcome applicants from all backgrounds.
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